package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperations implements IOperations{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入想要删除的书名");
        String name = scanner.nextLine();

        int usedszie = bookList.getUseSize();
        int pos = -1;
        int i = 0;
        for (i = 0; i < usedszie; i++) {
            Book book = bookList.getBooks(i);
            if(book.getName().equals(name)) {
                System.out.println("找到了这本书");
                pos = i;
                break;
            }
        }
        if(i == usedszie) {
            System.out.println("没有这本书");
            return;
        }
        for (int j = pos; j < usedszie - 1; j++) {
            Book book = bookList.getBooks(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(usedszie-1,null);
        bookList.setUseSize(usedszie-1);
        System.out.println("成功删除了这本书");
    }
}
